org.apache.zeppelin.interpreter.InterpreterInfoSaving.java Source code

Introduction

Here is the source code for org.apache.zeppelin.interpreter.InterpreterInfoSaving.java

Source

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.zeppelin.interpreter;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.internal.StringMap;
import org.apache.commons.io.IOUtils;
import org.apache.zeppelin.common.JsonSerializable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.sonatype.aether.repository.RemoteRepository;

import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.PosixFilePermission;
import java.util.*;

import static java.nio.file.attribute.PosixFilePermission.OWNER_READ;
import static java.nio.file.attribute.PosixFilePermission.OWNER_WRITE;

/**
 *
 */
public class InterpreterInfoSaving implements JsonSerializable {

    private static final Logger LOGGER = LoggerFactory.getLogger(InterpreterInfoSaving.class);
    private static final Gson gson = new GsonBuilder().setPrettyPrinting().create();

    public Map<String, InterpreterSetting> interpreterSettings = new HashMap<>();
    public List<RemoteRepository> interpreterRepositories = new ArrayList<>();

    public static InterpreterInfoSaving loadFromFile(Path file) throws IOException {
        LOGGER.info("Load interpreter setting from file: " + file);
        InterpreterInfoSaving infoSaving = null;
        try (BufferedReader json = Files.newBufferedReader(file, StandardCharsets.UTF_8)) {
            JsonParser jsonParser = new JsonParser();
            JsonObject jsonObject = jsonParser.parse(json).getAsJsonObject();
            infoSaving = InterpreterInfoSaving.fromJson(jsonObject.toString());

            if (infoSaving != null && infoSaving.interpreterSettings != null) {
                for (InterpreterSetting interpreterSetting : infoSaving.interpreterSettings.values()) {
                    interpreterSetting.convertPermissionsFromUsersToOwners(jsonObject
                            .getAsJsonObject("interpreterSettings").getAsJsonObject(interpreterSetting.getId()));
                }
            }
        }
        return infoSaving == null ? new InterpreterInfoSaving() : infoSaving;
    }

    public void saveToFile(Path file) throws IOException {
        if (!Files.exists(file)) {
            Files.createFile(file);
            try {
                Set<PosixFilePermission> permissions = EnumSet.of(OWNER_READ, OWNER_WRITE);
                Files.setPosixFilePermissions(file, permissions);
            } catch (UnsupportedOperationException e) {
                // File system does not support Posix file permissions (likely windows) - continue anyway.
                LOGGER.warn("unable to setPosixFilePermissions on '{}'.", file);
            }
            ;
        }
        LOGGER.info("Save Interpreter Settings to " + file);
        IOUtils.write(this.toJson(), new FileOutputStream(file.toFile()));
    }

    public String toJson() {
        return gson.toJson(this);
    }

    public static InterpreterInfoSaving fromJson(String json) {
        return gson.fromJson(json, InterpreterInfoSaving.class);
    }
}